Really fail in any case.
Really fail in any case.

Using assert(0) to abort is an unfortunate choice, as it won't work
if compiled with -DNDEBUG.

	* include/libport/visitor.hh (_libport_visitor_dispatch):
	Use "abort" instead of "assert(0)".

aldebaran/libport,aldebaran/libport,aldebaran/libport,aldebaran/libport,aldebaran/libport